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Protusion of the tongue is primarily for bringing scent particles to the Jacobson's (vomeronasal) organ for olfaction. The vomeronasal system is a specially modified and highly developed olfactory pit located in the roof of the mouth and innervated by a separate branch of the olfactory nerve. Scent particles picked up from the surroundings by the tongue are conveyed to the palate, to pass up through a duct into Jacobsons organ for 'tasting'.
 
Protusion of the tongue is primarily for bringing scent particles to the Jacobson's (vomeronasal) organ for olfaction. The vomeronasal system is a specially modified and highly developed olfactory pit located in the roof of the mouth and innervated by a separate branch of the olfactory nerve. Scent particles picked up from the surroundings by the tongue are conveyed to the palate, to pass up through a duct into Jacobsons organ for 'tasting'.
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==References==
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* Schwenk, K. (1985). Occurrence, distribution and functional significance of taste buds in lizards. Copeia 1, 91-101
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